Steam oscillating valve



(No Model.) 2 SheetsSheet 1.

, J. M. KELLS.

STEAM OSGILLATING VALVE.

'No. 312,126. Patented Feb 10, 1885. y

(No Model.)

J. M. KELLS.

STEAM OSOILLATING VALVE. I No. 312,126. I Patented Feb. 10, 1885.

2 Sheets-Sheet 2.

WITNESSES i/Vl/E/VTOR JACOB M. KELLS, or ADRIAN, MICHIGAN.

STEAM OSCILLATING VALVE.

SPECIFICATION forming part of Letters Patent No. 312,126, dated February10, 1885.

Application filed July 19, 1884. (No model.)

To all whom it may concern.-

Be it known that I, JACOB M. KELLS, of Adrian, in the county of Lenaweeand State of Michigan, have invented certain new and useful Improvementsin Steam Oscillating Valves; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to an improvement in steam oscillating valves, theobject of the same being to provide a valve in which the pressure of thesteam in the steam-chest shall be taken off the valve, the frictionalwear being thereby reduced to a minimum, a further object being toprovide a simple, convenient, and inexpensive valve adapted for use onlocomotives and all ordinary engines.

WVith these ends in View my invention consists in certain features ofconstruction and combination of parts, as will be hereinafter described,and pointed out in the claim.

In the accompanying drawings, Figure 1 is a view of the valve mounted, aportion of the casing being removed. Fig. 2 is a central sectiontransverse to the axis of the valve, and Fig. 3 is a central section inthe plane of the axis of'the valve at right angles to the base.

A represents a cylindrical casing rigidly secured on a suitable support,B. Through the flat face of the support B the steam-ports I) lead fromthe inside of the cylindrical cas ing A to the cylinder. Through theopposite ends of the casing A, between the axis of the valve D and thesupport B. steam-ports a are formed, leading to the inside of thecasing.

The casing A is further provided with an exhaust-port, a. located aboutmidway between the steam-ports b.

The valve proper consists of a hollow cylinder, D, adapted to fit withinthe cylindrical casing A, and provided with journals (1, adapted to restin the boxes centrally located in the ends of the casing A.

The valve D is provided with steam and exhaust ports I) and 12 locatedin pairs, being about one-third of the circumference of the cylinderapart, as shown in the drawings, to correspond with the ports b in thecasing B, with the exhaust-port cl, corresponding to the port a in thecasing A, and with the steamports (1 corresponding with the ports a inthe casing. A diaphragm, F, extends from between the steam and exhaustports b and I)" to the center or ,axis of the valve D, thus separatingthe interior of the valve into two chambers, 00 and J.

The ports d and (Z are constructed of sufficient length to admit of thevalve D being rotated the distance between the centers of one of thepairs 1) b without shutting off the entrance of the steam through theports a, or the exhaust through a.

The valve is conveniently operated by means of a crank-arm, f, securedon the end of one of the journals (1.

From the above construction it will be observed that the pressure of thelive steam within the chamber i is continuous, the same being admittedthrough the opposite ports, a,- that the slight: rocking of the valve bythe valve-operating mechanism brings one of the ports I) over one of theports I) and introduces live steam into the cylinder, and at the sametime brings one of the ports b over the other port I), and therebyallows an exhaust into thechamber a and out through the ports (1' and a.

The important advantages of my invention are the slight movement of thevalve required to open and close the ports and the constant pressure ofthe steam within the valve. which t'eatu res render. the frictionextremely light and the valve consequently very durable and capable ofbeing operated by slight power.

Having fully described my invention, what I claim as new, and desire tosecure by Let ters Patent, is

In an oscillating valve, the combination, with a cylindrical valve boxor casing having a steam-inlet port and an exhaust-port, and ports 1),connecting with a cylinder, of a hollow cylindrical valve provided witha steaminlet port and an exhaust-port registering, respectively, with,and of greater size than, the corresponding ports of the valve-box, andwith the ports I) and b arranged in pairs on opposite sides of thediaphragm,substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

JACOB M. KELLS.

Witnesses:

GRANT A. RoeERs, W. A. UNDERWOOD.

